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침윤성방광암에서 경요도절제술과 고선량체외방사선요법의 효과
허만우,김민의,박영호 순천향의학연구소 1998 Journal of Soonchunhyang Medical Science Vol.4 No.2
Purpose: We analyzed the role of TURB and definitive radiation therapy as curative treatment of muscle-invasive bladder cancer. Materials and Methods: From Jan. 1985 through Dec. 1992, 23 patients with muscle-invasive transitional cell carcinoma of the urinary bladder who were not candidate for radical cystectomy or chemotherapy were received TURB and pelvic external beam radiation therapy(external beam radiation, mean 6500 cGY, mean 8 weeks). T categorization was based on clinical examination assessing the computed scan and the transurethral biopsy. Results: Of 23 evaluable patients overall 2-year and 5-year survival rate following TURB and radiation therapy were 445(10/23) and 26%(6/23), respectively. Five-year survivals by clinical stage were 3(43%) of 7 with stage T3a, 2(29%) of 7 with stage T3b, and 1(11%) of 9 with stage T4. Overall complete remission and partial remission were achieved in 6(26%) of 23 patients and in 9(39%) of 23 patients, respectively. Complete remission by clinical stage was achieved in 4(57%) of 7 with stage T3a and in 2(29%) of 7 with stage T3b, and in 3(33%) of 9 with stage T4. Acute and self-limited complications of radiation therapy such as dysuria, diarrhea, and urinary frequency occured in 61% of the patients during the radiation therapy. Conclusions: Definitive radiation therapy after TURB is appliable bladder preserving modality in patients with muscle-invasive bladder carcinoma when they are not proper candidates due to general inoperability or due to the patient's preference.
우정인,최선영,정영일,서정기,허태원 東亞大學校 大學院 1999 大學院論文集 Vol.24 No.-
본 논문에서는 PWM AC-DC 컨버터의 정상상태 제어오차를 제거하고, 과도 특성을 향상시키기 위한 새로운 전류제어계를 제안한다. 먼저, 일반적인 PWM 컨버터에 대한 상태공간 모델로 표현된 수학적 모델이 제시된다. 컨버터의 상태공간 모델은 제안하는 전류제어계를 포함한 PWM 컨버터의 시뮬레이션에 사용된다. 본문에서 제안하는 정현추종 제어계는 교류성분의 전류를 직접추정 제어 하기때문에 좌표변환 알고리즘을 필요로하지 않는다. 입력전류 제어계의 전달함수롤부터 정상상태 오차가 영이되는 것을 입증한다. 그리고, 시뮬레이션과 실험을 통하열 본 제어방식의 타당성을 입증하고자 한다.
태양광 발전전력을 입력으로한 DC/DC 컨버터의 일정출력제어
조용길,허태원,신동률,조광승,우정인 東亞大學校 大學院 2000 大學院論文集 Vol.25 No.-
In this paper, it is proposed to constant power control of solar power system. The solar power system has disadvantage that low power density and variable power output. Proposed strategy is controled by DC/DC converter using phase shift PWM and I-PD type control applying type 1 digital system. The validity of proposed control strategy is verified from simulations results using PSIM.
강형모,권경우,김기길,정의식,허영환 한밭대학교 산업과학기술연구소 1994 논문집 Vol.2 No.-
This paper presents results of the development of centerless feeding system which are applicable to bearing metal processes. As a result, the feeding system can be applied to automatic surface finishing on the bearing metal process such as bush, and has greatly effects on the increase of the prodnctiving and the decrease of the man power an effect on increase the productivity and decrease the man power and effect on increase the productivity and decrease the man power of the bush machining process.
조백현,김영길,허우회,최석현 大韓成形外科學會 1983 Archives of Plastic Surgery Vol.10 No.2
The purpose of this study was to investigate the sequential changes of enzyme activities in severely burned skin of rat at intervals of 2 hours, 8 hours, 1 day and 3 days by histochemical methods. The results obtained were as follows. 1. Acid phosphatase activity was found to be transient increase in dermis and mild decrease in epidermis, hair follicle and sebaceous gland at 2 hour after burning. The activity was not seen in skin after 8 hours. 2. Alkaline phosphatase was found to be decreased in blood vessel and dermal papillae of hair follicle at 2 hour after burning and then was progressively decreased after 8 hours. 3.α-naphtyl acetate esterase activity was found to be decreased in epidermis, dermis and hair follicle at 2 hours after burning and was not seen in skin after 8 hours. There was no significant changes in sebaceous gland after burning.
이상하,최재석,이광열,장영수,임인수,허우명,김재구,김범철 강원대학교 부속 환경연구소 2005 Journal of the Environment Vol.2 No.-
To investigate nutrient dynamics of the lake and fish community, both water and fish samples were collected at three different areas (dam site, upper inflowing and downstream of lake outfow) for one year from Sep.2004 to Aug.2005 During the experimental periods, mean concentration of chl, a in epilimnetic layer (0-5m) was 18.5mg^(-3) and transparency ranged from 0.3m to 2.4m, respectively. In nutrient, mean concentrations of TP and TN were 111 mgP m^(-3) and 4.4 mgN L^(-1), respectively. Based on the water quality standard suggested by U.S.EPA(*1976), the trophic state of Lake Doam was classified as eutrophic state. Total number of fish collected in Lake Doam was 9,600 indiveduals in 26 species of 6 family. Sixteen of Korean endemic soecies including H. mylodon, A. signifer, P. tenuicorpa occurred. O. mykiss as introduced fish was also found in Lake Doam. Dominant and subdominant species were P. herzi and Z. platypus that took about 34.6% and 22.5% of total fish composition, respectively. Six species including A. signifer. P. tenuicorpa. and R. kumgangensis were rare in Lake Doam. Pelagic typw of figh commonly occurred at upper regions, whereas benthic type was mainly domenated at downstream area. Therefore, pollution source inflowed from the upper regions did not seriously affect downstream area (Songcheon water system) due to the role of dam as pollutant barrier. In addition high appearance of Comat type of fish that si hybrid between gold fish (C.auratus) and C. auratus was found in the lake, It was unclear the reasons that high prorortion of mutant species apperared in the lake. Further more researches are required in this area.
김종우,박찬,김주환,허석,김동규,이동길,조영도,박삼규,Kim, Jong-Woo,Park, Chan,Kim, Ju-Hwan,Heo, Seok,Kim, Dong-Kyu,Lee, Dong-Kil,Jo, Young-Do,Park, Sam-Gyu 한국암반공학회 2015 터널과지하공간 Vol.25 No.3
본 연구에서는 최근 재개발되고 있는 정선지역의 철광산에서 현장 초기지압 시험과 수많은 암석 실내시험을 실시하였다. 본 광산의 측압계수는 심도가 깊어질수록 작아지는 경향을 보였으며 평균값은 1.10으로 나타났다. 본 광산에 주로 분포하는 네 가지 암종인 백운암, 규장암, 화강암, 철광석에 대한 실내시험을 통해 암석의 단위중량, 공극률, 흡수율, 탄성파속도, 일축압축강도, 영률, 포와송비, 인장강도, 쇼어경도, 내부마찰각, 점착력 등의 각종 역학적 특성을 조사하였다. 실내시험 결과의 통계분석을 통해 암종별 물성을 비교하였고 물성 상호간의 관련성을 검토하였는데, 철광석보다는 규장암이나 화강암의 강도특성이 더 컸으며 암석 물성 간의 일반적인 상관관계와는 반대되는 현상도 발견되었다. 또한 Mohr-Coulomb 파괴조건과 Hoek-Brown 파괴조건을 적용하여 네 가지 암석의 파괴조건을 해석하였다. In this study, both in-situ stress measurements and a lot of laboratory rock tests were conducted at a metal mine in Jeongseon, Korea. The stress ratio obtained from in-situ stress measurements showed a tendency to decrease according to depth below surface and its average value was 1.10. The mechanical properties such as unit weight, absorption ratio, porosity, elastic wave velocity, uniaxial compressive strength, Young's modulus, Poisson's ratio, tensile strength, shore hardness, friction angle and cohesion were investigated for the four different rocks mainly distributed at a studied mine, which were dolomite, felsite, granite and magnetite. The mechanical properties of the four different rocks were compared by means of statistical analyses, whereupon the felsite and the granite turned out to have more strength characteristics than the magnetite. The correlation of mechanical properties was also investigated, whereupon a few results against the general correlation were found out. The failure criteria of the four different rocks were finally discussed by means of both Mohr-Coulomb criterion and Hoek-Brown criterion.